Natural gas shut off system

Abstract

A system for turning off the flow of natural gas into a structure is used where the control is used on the exterior of the structure. The control is operated pneumatically and is connected by an air flow conduit to a valve that is located on a natural gas feed line in the interior of a structure.

What is claimed is: 
     
       1. A process for controlling the flow of natural gas through a structure which comprises providing a pneumatically-operated valve on a natural gas feed line, providing a pneumatic control for said feed line, and providing an gas extending in air flow connection from said pneumatically-operated valve to said pneumatic control, positioning said pneumatic control on an outside portion of said structure and positioning said feed line and said valve in an interior portion of said structure, and using means in said pneumatic control to permit the passage of natural gas through said valve when in an open position and through said feed line. 
     
     
       2. The process of claim 1 wherein said valve is in said open position when gas pressure exists in said system. 
     
     
       3. The process of claim 1 wherein said valve is in said open position when air pressure is absent in said system. 
     
     
       4. The process of claim 1 wherein said pneumatic control has a means for releasing gas from said system. 
     
     
       5. The process of claim 1 wherein said valve has means for permitting the pumping of air into said system. 
     
     
       6. The process of claim 1 wherein said pneumatic control has tamper-proof means to prevent the unauthorized use thereof. 
     
     
       7. The process of claim 1 wherein said valve has tamper-proof means to prevent the unauthorized use thereof. 
     
     
       8. The process of claim 1 wherein said conduit is a tube having a wire extending therethrough for substantially its entire length. 
     
     
       9. The process of claim 1 wherein said valve is positioned in said system at a location adjacent a gas meter. 
     
     
       10. A system for controlling the flow of natural gas through any structure which comprises a natural gas meter, a natural gas feed line with a valve attached thereto, said valve and natural gas meter located in an interior of said structure, a pneumatic control for said natural gas feed line located in a location exterior to said structure, and a gas conduit extending in gas flow connection from said valve to said pneumatic control, said valve when in an open position having means to permit natural gas from said natural gas feed line to pass therethrough, said valve having means to cooperate with said pneumatic control to prevent the flow of natural gas therethrough when said valve is in a closed position and at least one of said valve and said pneumatic control having tamper-proof means integral therewith. 
     
     
       11. The system of claim 10 wherein said valve is in said open position when gas pressure exists in said system. 
     
     
       12. The system of claim 10 wherein said valve is in said open position when gas pressure is present in said system. 
     
     
       13. The system of claim 10 wherein said pneumatic control has a means for releasing gas from said system. 
     
     
       14. The system of claim 10 wherein said valve has means for permiting the pumping of gas into said system. 
     
     
       15. The system of claim 10 wherein said pneumatic control has tamper-proof means to prevent the unauthorized use thereof. 
     
     
       16. The system of claim 10 wherein said valve has tamper-proof means to prevent the unauthorized use thereof. 
     
     
       17. The system of claim 10 wherein said conduit is a tube having a wire extending therethrough for substantially its entire length. 
     
     
       18. The system of claim 10 wherein said valve is positioned in said system at a location adjacent a gas meter.